var num=0
var over=false
var t = setInterval(function() {
    var nprogress=document.querySelector('.nprogress')
    if(num>=95 && !over) return
    num++
    if(nprogress){
        nprogress.style.width=num+'%'
    }else{
        var nprogress = document.createElement('div')
        nprogress.className='nprogress'
        nprogress.style.position='fixed'
        nprogress.style.top = 0
        nprogress.style.width=num+'%'
        nprogress.style.height = '5px'
        nprogress.style.backgroundColor = '#29d'
        document.body.appendChild(nprogress)

        var nprogressRadius=document.createElement('div')
        nprogressRadius.className='nprogressRadius'
        document.body.appendChild(nprogressRadius)
    }
    if(num>=110){
        document.body.removeChild(nprogress)
        clearInterval(t)
        document.body.removeChild(document.querySelector('.nprogressRadius'))
    }
},10)

// 5、【优化1】网页未加载完毕，暂停操作进度条
window.addEventListener('load', function(){
    over = true
})